Season Description The 2009–10 Euroleague was the 10th season of the Euroleague, a professional basketball competition for elite clubs throughout Europe organised by Euroleague Basketball Company, and it was the 53rd season of the premier competition for European men's clubs overall. The regular season featured 24 teams from 13 countries.
This season marked the first time since 2001–02 season that a qualifying round was used to determine the last two teams for the regular season. The qualifying round started on September 29, 2009, while the regular season of the Euroleague started on October 15, 2010. The season ended with the Euroleague Final Four, which was hosted at the Palais Omnisports de Paris-Bercy in Paris, France, with the final on May 9, 2010.